I submitted this bug before, but now have more information.  Anaconda will 
generate an exception when looking for packages to upgrade when the 
following conditions are true.

/home is a symlink to /usr/home.

the FSTab reads as follows.

/dev/hdc1       /usr                    ext2    defaults,usrquota       1 1
/dev/hda3       /home/ftp/pub/rh    ext2    defaults                1 1

Anaconda yaks because the /dev/hda3 device is not mounted 
to /usr/home/ftp/pub/rh.  Once that is changed, anaconda works 
flawlessly.  IMHO, anaconda should not barf on an incorrectly configured, 
yet functional, /etc/fstab.

Let me know if you have any other questions!

Traceback (innermost last):
  File "/usr/bin/anaconda", line 438, in ?
    intf.run(todo, test = test)
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/text.py", line 1028, in 
run
    rc = apply (step[1](), (dir,) + step[2])
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/text.py", line 279, in 
__call__
    todo.upgradeFindPackages (root)
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/todo.py", line 928, in 
upgradeFindPackages
    self.fstab.mountFilesystems (self.instPath)
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/fstab.py", line 708, in 
mountFilesystems
    iutil.mkdirChain(instPath + mntpoint)
  File "/var/tmp/anaconda-7.0.1//usr/lib/anaconda/iutil.py", line 193, in 
mkdirChain
    os.mkdir(path, 0755)
OSError: [Errno 17] File exists: '/mnt/sysimage/home'

Local variables in innermost frame:
which: 4
dir: /mnt/sysimage/home/ftp/pub/rh
elements: ['', 'mnt', 'sysimage', 'home', 'ftp', 'pub', 'rh']
path: /mnt/sysimage/home

ToDo object:
(itodo
ToDo
p1
(dp2
S'method'
p3
(iimage
CdromInstallMethod
p4
(dp5
S'progressWindow'
p6

<failed>